JAJSSD2A October 2023 – December 2023 BQ25638
PRODUCTION DATA
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For safe operation, the device has an additional hardware pin on ILIM to limit the maximum input current on ILIM pin. The maximum input current is set by a resistor from ILIM pin to GND as:
The actual input current is limited to the lower of the two values set by ILIM pin and IINDPM register bits. The device regulates ILIM pin at 0.8 V. If ILIM voltage exceeds 0.8 V, the device enters input current regulation (refer to Dynamic Power Management).
The ILIM pin can also be used to monitor input current. The input current is proportional to the voltage on ILIM pin and can be calculated by:
The ILIM pin function is disabled when EN_EXTILIM bit is set to 0. When the pin is disabled, both input current limit and monitoring functions are not available.
An RC filter in parallel with RILIM is required when input current setting on ILIM pin is either:
The value of the RC filter is 1.2 kΩ and 330 nF, respectively.